If you don't know Acceledent, watch this:
https://www.youtube.com/watch?v=_0CZUbuGRZg
So what it does is accelerate bone remodeling. I think it might be a useful adjunct to Mewing, what do you think? Has anyone tried it? The animation makes it look like the vibrations spread pretty far, making me think it might be useful to accelerate not just tooth movement, but dental arch widening and palatal expansion. Thoughts?
Also, check out this device: costs only one fifth of Acceledent and supposedly is more effective in a shorter time period.
https://axeldental.ecwid.com/New-Viber-High-Frequency-125-Hz-p143460153
I forget to add that if the vibrations travel a few inches they also reach the jaw, cheekbones and the whole maxilla.